Computer networks allow interconnected computing devices to exchange data and share resources. They use communication protocols to transmit information over physical or wireless technologies. There are four main types of computer networks: local area networks (LANs), personal area networks (PANs), wide area networks (WANs), and metropolitan area networks (MANs). Effective networks require performance, reliability, and security. Network protocols like TCP, IP, UDP, and HTTP are used to facilitate communication. The OSI model defines seven layers of abstraction for network communication.

1. SUBMITTED TO- PRESENTED BY-
Md.Toukir Ahmed Pritom Bhowmik
Lecturer ID- 2101005
Department of ICT, BDU Department of ICT
Program- IoT
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2. ❑What is Computer Network?
❑Types of Computer Networks.
❑Criteria of Network.
❑What is Protocol in Computer Network?
❑Details of OSI Model.
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3. Computer networking refers to
interconnected computing
devices that can exchange data
and share resources with each
other. These networked devices
use a system of rules, called
communications protocols, to
transmit information over
physical or wireless
technologies.
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4. Components of
Computer Network
Router
Modem
Hub
National
Interface
Card
Cables &
Connectors
Switches
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5. ❖Local Area Networks (LANs)
1. Short distances.
2. Designed to provide local interconnectivity.
❖Personal Area Networks (PANs)
1. short-range wireless networks that work over a range of tens of metres.
2. Typical PAN technologies include: Cordless products such as mouse devices and keyboards.
❖Wide Area Networks (WANs)
1. Long distances.
2. Provide connectivity over large areas.
❖Metropolitan Area Networks (MANs)
1. Provide connectivity over areas such as a city, a campus.
Computer network is mainly of four types:
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6. PAN
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7. Three criteria necessary for an effective and efficient network. These
are:
Network
Criteria
Performance Reliability Security
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8. What is the Protocol in
Computer Network?
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9. Some Network Protocol
1.Transmission Control Protocol (TCP)
2.Internet Protocol (IP)
3.User Datagram Protocol (UDP)
4.Post office Protocol (POP)
5.Simple mail transport Protocol (SMTP)
6.File Transfer Protocol (FTP)
7.Hyper Text Transfer Protocol (HTTP)
8.Hyper Text Transfer Protocol Secure (HTTPS)
9.Telnet
10.Gopher
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10. The Open Systems Interconnection
(OSI) model describes seven layers
that computer systems use to
communicate over a network. It was
the first standard model for network
communications.
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12. THANK
YOU
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